整流部を設けた円管内乱流のラージ・エディ・シミュレーション

抄録

Turbulent incompressible flow through a pipe with a rectifier part composed of 19 narrow tubes is calculated by Large Eddy Simulation (LES) with the immersed Boundary (IB) method and the effect of the rectifier-part length on the turbulent field is studied in the present work. The streamwise mean flow accelerates near the center of the pipe in the rectifier tubes. As a result, turbulence is suppressed by the tube bundle rectifier in its downstream region and the suppression is strengthen as the length of the rectifier part increases.